import { mat4 } from 'gl-matrix';
export declare type V3 = [number, number, number];
export declare class Camera {
    readonly pv: Float32Array;
    readonly iPv: mat4;
    readonly eyePosition: V3;
    readonly direction: V3;
    readonly fovCenter: V3;
    readonly ed: number;
    readonly aspectRatio: number;
    readonly fovy: number;
    readonly arc: number;
    readonly radius: number;
    constructor(pv: Float32Array);
    ndc2xyz(ndx: number, ndy: number, ndz: number): V3;
    ndc2sphereXYZ(ndx: number, ndy: number, safe?: boolean, r0?: number): V3;
}